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Power cuts and EPI vaccine storage
M P Senanayake1, A S Perera, T U De Silva
1University of Colombo.
The Ceylon Medical Journal
|June 1, 1997
Summary
Vaccine storage integrity is compromised during power outages. Diphtheria-pertussis-tetanus (DPT) and measles vaccines lost potency, while oral polio vaccine remained stable during 2-hour power interruptions.
Area of Science:
- Public Health
- Vaccinology
- Cold Chain Management
Background:
- Maintaining the cold chain is crucial for vaccine efficacy.
- Power supply interruptions pose a significant threat to vaccine integrity.
Purpose of the Study:
- To assess the impact of power supply interruptions on Expanded Program of Immunisation (EPI) vaccine storage.
- To evaluate the availability of alternative refrigeration facilities during power failures.
Main Methods:
- A study was conducted in Colombo District health centers.
- Interviewer-administered questionnaires, facility inspections, and thermosensitive cold chain monitors were used.
- Vaccine storage was monitored during daily 2-hour power cuts and a control period without interruptions.
Main Results:
- Diphtheria-pertussis-tetanus (DPT) and measles vaccines were exposed to temperatures exceeding recommended ranges during power cuts.
- Oral polio vaccine storage remained adequate despite 2-hour power interruptions.
- No alternative facilities for vaccine refrigeration during power failures were identified.
Conclusions:
- The potency of DPT and measles vaccines is compromised by power interruptions of 2 hours or more.
- Lack of alternative storage solutions exacerbates vaccine cold chain risks.
- Ensuring reliable power or alternative storage is vital for maintaining vaccine efficacy.